Lightbulb [Q] Breathing softkey/hardkey lights?

I was reminding old E series of Nokia symbian phone, and especially the E72 with a shiny light breathing bulb on the center of the device.

As we know, most of Android devices have hardkeys or softkeys on their bodies, and most of them also are equiped with white shiny LED on the softkeys or hardkeys.
So my question is: How to make those tiny Android keys "breathe" like Nokia ? Is there an app that could do that or any .zip file that can be flashed through Recovery Menu?